TY JOUR TI Sino-Russian Space Weather Effort for Global Air Navigation Safety KW space weather KW air navigation KW civil aviation KW ionizing radiation KW GNSS KW X-ray bursts KW solar flares KW HF communications KW radiation dosimetry JO Russian Journal of Earth Sciences AU Kholodkov, K.. AU Aleshin, I.. AU Arakelov, A.. AU Burov, V.. AU Vasiliev, A.. AU Ivanov, S.. PY 2021 IS 21 PB Geophysical Center of the Russian Academy of Sciences